CBS News science and futurist contributor, Dr. Michio Kaku returns to ‘CBS This Morning’ to discuss Kathryn Schulz‘s recent New Yorker article, ‘The Really Big One’ — an examination of the Cascadia subduction zone that predicts a "mega-quake" capable of wiping out a major portion of the Pacific Northwest and potentially triggering the worst natural disaster in North American recorded history. WATCH NOW!